Scratch build "Bertha"
03-01-2015, 06:52 AM
#29
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After attaching the tailwheel assy to fuse ( pic attached) I mounted motor and piled remaining bits in fuse ( servos , battery , etc then weighed again . Ready to cover she's at 33 lbs . I'm wondering if I should set the zenoah g62 aside and put the DA 100 I have on her !? Have to make a new cowl if I do . I would drop almost two lbs in motor weight and gain almost 4 hp. What would you all do?
03-02-2015, 07:26 AM
#31
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Hey Bob, my g62 is mag fired and has the recoil spring start. It weighs 6 lbs on my postage scale. My Da100 weighs 4.25 lbs but as I typed this reply I realized I didnt weigh the stock headers or electronic ignition. So weights are going to be very close to same I guess. Ouch , I just thought of battery for Da ignition ! Well Bob , at my age I can claim another " senior moment " ( egg on face appropiate here! ) . I've never used these large motors before , they've only sat on my shelves!
So , I really wouldnt be gaining anything but " grunt" eh?
So , I really wouldnt be gaining anything but " grunt" eh?
03-06-2015, 03:57 PM
#34
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B Matthews , what would you think of hoerner wingtips added to Bertha? , aside from the added 16" to wingspan that is . I've attached a pic of a roughed out shape .
03-08-2015, 05:00 PM
#36
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No one ❓ love it hate or otherwise ❓c'mon Mr Matthews get the ball rolling on this "hoerner " wingtip question. Some dang body needs to tell me no and some other dang body cheer me on ��
Dont be skeered ❗Im a old fart thats just having fun wading off into new fields , not gonna hurt my feelings ��
Dont be skeered ❗Im a old fart thats just having fun wading off into new fields , not gonna hurt my feelings ��
03-09-2015, 06:32 PM
#38
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Bob , you are a kindly soul ❗you must be to reply to a old man thats attempting to stir up some " out of the box " aerodynamic folderol discussion.
So ..... While youre so inclined ..... What would you think of some vg 's all along those purty wings❓
So ..... While youre so inclined ..... What would you think of some vg 's all along those purty wings❓
03-10-2015, 07:05 AM
#40
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Hmmmmm, I really want it to slow way down for landing , but to also retain a lot of control at slow speed . After reading one modelers experience with a 1/3 scale super cub using ultralight vg's from Aircraft Spruce I got all hot and bothered to use them. I guess BMatthews advice on the airfoil has me more worried than I realized.
